beef up test

test/function/if-statement-with-assignment/main.js

@@ -1,4 +1,6 @@
 var result = 0;
-if ( Math.random() <= 1 ) result += 1;
+if ( Math.random() <= 1 ) {
+	if ( Math.random() <= 1 ) result += 1;
+}
 
 assert.equal( result, 1 );

test/function/if-statement-with-update/main.js

@@ -1,4 +1,6 @@
 var result = 0;
-if ( Math.random() <= 1 ) ++result;
+if ( Math.random() <= 1 ) {
+	if ( Math.random() <= 1 ) ++result;
+}
 
 assert.equal( result, 1 );